Device for controlling agents of combustion



Feb. 27, 1934.. c. OTTO DEVICE FOR CONTROLLING AGENTS OF COMBUSTION Filed Dec.

Z l/VVE/VTOR Fatented Felta 27, 1934 wrap STATES DEVICE FOR CONTROLLING AGENTS F COMBUSTION Carl Otto, Essen-Ruhr, Germany Application December 11, 1926, Serial No. 154,209

. In Germany December 16, 1925 11 Claims. -(Cl. 2776) This invention relates to adevice for controlling the supply and discharge of the agentsof combustion in regenerative furnaces;

In all kinds of regenerative furnaces, such as coke ovens and the like, means-must be provided to control the supply of the agents of combustion to be preheated, such as gas and air, in the regenerator and to discharge the hot waste gases, which heat the regenerator. These means must permit the change of the direction of flow of the agents passing through the regenerator, upon reversal of the furnace. At the same time these must prevent any transition or leakage from. the conduits of the agents of combustion to be 'preheated, that is air, or air and gas, to the conduits which carry off the waste heat.

My invention has for its object to provide a particularly simple and efficient embodiment of a controlling device of this type, in which the requirements pointed out above, are met in the most satisfying manner.

In order to allow my invention to be more easily understood, anexample of the same, adapted to be used with coke ovens, heated with strong or weak gas, i. e. heated'with coke oven gas or with producer or blast furnace gas, will be described in detail with'reference to the drawing which forms part of this specification. In this drawing:

Figure 1 is a vertical longitudinal section through the controlling device. I

Figure 2 is a horizontal section on line 2-2 of Figure l, and

Figure 3 is a detail view on an enlarged scale.

The controlling device consists of a double seat valve, the stationary parts of which are a lower valve chamber a and an upper valve chamber b, which is constructed in the usual way as a hollow cylinder having a flanged pipe coupling device substantially consist of 'a lower valve 0 and an upper valve d, which are mounted on a common stem 6'. Lower valve 0, which preferably has guide vanes 0 is adapted to shut off the chamber a, from'thelower fiangedpipe coupling (1 while the upper valved, shuts'it oil from chamber b. The double valve is constructed as and pipe 10, to the. gas regenerator (not-shown).

a gravity valve, without any spring load. Upon lifting stem e, the valves 0 and dmove upward,

"o ,intorthel"chamber a-and passes through? cou- 1 5 asthey are jointly lifted from their seats a and b, respectively, by collars f g, f fast .on stem e and engaging the valves from below. vWhen stem e is lowered, the valves c and d, come to as own weight. r

b integral with it. The movable parts of the rest upon their seats again'by the action of-ztheir i gas from the mainrthrough pipe 12. Theflap o;-i no The upper valve d, has screwed in it a tube h (Fig. 3) surrounding the valv'e'steme, with clearance, and, likewise, capable of being shifted relatively to the chambers a and b. On the cham-' ber the tube It is tightened by a stufiing boxi. This arrangement makes it possible tojactuate the upper valve (1, independently of the lower valve '0, by means of an actuating lever (not shown), attachedto the tube h, or to actuate both valves simultaneously by means of the stem 05 e. A locking lever k, Fig. 1, may engage the tube h, as shown, to holdthe valve 11, in its open-position.

The coupling a, of chamber a, has connected to it a waste heat conduit m of the furnace. 7o

Chamber a, is also provided with two lateral flanged couplings a to which are connected channels n, n which lead to the air regenerator (not shown). Chamber a, which may also communicate with chamber b, by means of valve d, 15 is also in communication with the outer air by means of an opening at a, which may be closed 'by flap 0. Pipe 10, connected to coupling 1), of

chamber b, leads to a gas regenerator (not shown) and is provided with a coupling 12 which so is in communication with the weak gas main by means of gas supply conduit 12 When the oven is heated with strong gas, i. e. coke oven gas and pipes 10 and n, n are all supplied with air, in order to insure a uniform distribution of the air enter- 35 ing through opening afl 'a bafile plate q may be 1 arranged on the flange of the opening a, as illustrated in Figure l.

' The adjustment of thecontrolling device to fulfill the difierent conditions of operation takes 00 place in the following manner.

When one controlling device is positioned so as to, supply tofthe regenerators, another valve is so positioned as to'discharge the waste gases coming from the furnace to a waste heat conduit; When the cokeoven is to be heated by weak.

gas,' the communication between the coupling to .the'weak gas main is established by opening valve p in pipe p and 'the fiap o of opening a is opened soas to supply air to chamber a.'

The valves 0 and d are'in. closed position. Weak. gas flows from the main through-coupling p The airfor combustion enters through opening also closed, so that there is no further flow oi air through chamber a, to the channels n, 1: The valves 0 and d, are opened by lifting stem c. Waste heat coming from the regenerators, which previously operated as inflow regenerators, now flows through the pipe p and channels n, 12 into the chambers b and a, and passes through the bottom coupling a to waste heat channel m.

When the coke oven is to be heated by strong gas, 1. e. coke oven gas, all the regenerators are supplied with air to be preheated. The coupling p, by means of valve p remains shut off from the weak gas main, flap 0, is opened and the upper valve d, is opened by lifting tube h, and fixed in open position by locking lever is. Air for combustion enters through opening a and passes through chambers a and b to pipe p and channels 11, n and from them to the regenerators (not shown). Alter reversal the same adjustments are made as with weak gas heating, viz. flap 0, is closed, pipe p ,.remains shut of! from the weak gas main and valves c and d, are opened. The waste gases flow, as before, through pipe p and channels 1:, 11 through the chambers'b and 0, into the waste heat channel m.

In addition to the advantages given in the above described operation, my controlling device results in the advantage that when the regenerative furnace is thrown out of operation with the valves d and 0, closed, the gas main, is shut oi! from the waste heat channel by two closed valves, so that any passage of gas to the waste heat channel is prevented with the greatest security. The same is the case when the furnace is operated with weak gas. Weak Bas irom the main entering pipe 9, is shut oil! from the waste heat channel by both valves 11 and c, which are closed. During heating with strong gas, (coke oven gas),- valve d, is open so that pipe p may also be supplied with air, but valve p is closed and this with the entering air flowing through pipe p and channels n, 12 forms a closure preventing the leakage of weak gas to the waste heat channelm.

The present invention, it will be seen, oflers a simple controlling device which is reliable in operation and may be applied to all types or regenerative furnaces.

What I claim as new and desire to secure by Letters Patent, is: v

1. A device for controlling the flow oi gases to and-from regenerators comprising in combination, two communicating chambers, one having an air inlet port, a valve for the port, a conduit communicating with and adapted to. connect each 01 the said two chambers with a separate regenerator, a waste heat conduit connected with one of said chambers, and a pair of valves, one adapted to control communication between the said two chambers and the other adapted to control communication with the waste heatconduit. r

2. A device for controlling the flow oi gases to and from regeneratorscomprising in combination, apair oichnmbers, arranged one above the other, the lower chamber having an air inlet port, a valve ior the port, a conduit communicaiingwithandldaptcdtoconnecteachchamher with a separate regenerator, a waste heat conduit connected with the lower chamber, and a pair 0! 0031111! arranged valves,- one adapted to control communication between the chambers andth'eotberto control communication withthe waste-heat conduit.

tademerorcontrollingtheiiowotgasesto andtromregeneratorscomprlnnginccmbination,

nected with the lower chamber, and a pair of co-' axially arranged gravity valves, one adapted to control communication between the chambers and the other to control communication with the waste heat conduit.

4. A device for controlling the flow of gasm to and from regenerators comprising in combination, two communicating chambers, one having an air inlet port, a valve for the port, a conduit communicating with and'adapted to connect each oi the said two chambers with a separate regenerator, a waste heat conduit connected with one of said chambers, a pair oi coaxially arranged valves, one adapted to control communication between the said two chambers and the other to control communication with the waste heat conduit, and means for jointly operating said pair of valves.

5. A device for controlling the flow of gases to and from regenerators, comprising in combination, a pair of chambers arranged one above the other, the lower chamber having an inlet port, a valve for the port, a conduit communicating with and adapted to connect each chamber with a separate regenerator, a waste heat conduit connected with the lower chamber, a pair of valves arranged coaxially, one above the other, on a common stem, means for operating said valves jointly, and a tube surrounding said stem and secured to the upper valve, whereby it can be separately operated.

6. A device for controlling the flow or gases to and from regenerators comprising in combination, a pair of chambers, arranged one above the other, the lower chamber having an air inlet port, a valve for the port, a conduit communicating with and adapted to connect each chamber with a separate regenerator, a waste heat conduit connected with the lower chamber, a pair 0! valves arranged ooaxially, one above the other. on a common stem, means for jointly operating saidpairoi valveaatubesurroimdingsaidstem andsecuredtdtheuppervalvaandadaptedto separately liit said valve, and means for locking the upper valve in liited position.

7. Adeviceiorcontrolllngtheflow oigaseeto and from regeneratorscomprlsing in combinatim, apairorichambers,one abovetheothenthelower chamber havlngan air inlet port, a valve for the port,anupwardlyandinwardly extendingbaiiie plate mounted in the lower chamber adjacent said port, a conduit communicating with and adapted toconnecteachchamberwithaseparateregm-' and the other to control communication with the wasteheatconduit. a

8. Adevicetorcontrolhngtheiiowotgasesto and from regenerators, comprising incombinattomapoirotchamberaonesbovetheothenthe iowerchamberhavinganairport,avalveiortbe post, an inwardlysndupwardly extendingbelle plate mounted in. the lower chamber adjacent said port. a conduit connecting each chambe -withaseparateregenerator,awasteheatcoomiit connectedwiththelowerohambmapairotvalvm arranged coazlally, oneabove the other, on a commonstemmneadaptedtoconiroicomniunication between the chambers and the other to control communication with the waste heat conduit, means for operating said pair of valves jointly, and means for separately operating the upper valve.

9. A device for controlling the flow of gases to and from regenerators, comprising in combination, a pair of chambers, one having an inlet port, a valve for the port, a. conduit communicating with and adapted to connect each chamber with a. separate regenerator, a pipe communicating with one of said conduits and adapted to supply fuel gas thereto, a valve for said pipe, a waste heat conduit connected with one of said chambers, and a pair of coaxially arranged valves, one adapted to control communication between the chambers and the other to control communication with the waste heat conduit.

10. A device for controlling the flow or gases to and from regenerators, comprising in combination, a pair of chambers, one above the other, the lower chamber having an air inlet port, a valve for the port, a conduit communicating with and adapted to connect each chamber with a separate regenerator, a pipe communicating with the conduit of the upper chamber, and adapted to supply fuel gas to said conduit, a valve for the pipe, a. waste heat conduit connected with the lower chamber, and a pair of valves arranged coaxially one above the other, one being adapted to control communication between the chambers and the other valve. being adapted to control communication with the waste heat conduit.

11. A device for controlling the flow of gases to and from regenerators, comprising-m combination, a pair of chambers, one'above the other, the lower chamber having an air port, a valve for the port, a conduit communicating with and adapted to connect each chamber with a separate regenerator, a pipe communicating with the upper conduit, and adapted to supply fuel gas thereto, a valve for the pipe, a waste heat conduit connected with the lower chamber, a pair of valves arranged coaxially, one above the other, onevalve being adapted to control communication between the chambers and the other to control communication with the waste heat conduit, means for operating the pair of valves jointly and means for separately operating the upper valve.

CARL 0'11'0. 

